APA-referens (7:e uppl.)

(1974). Nature and existence of man ; Humanism and technological revolution ; Language, logic and action ; Man, logos and history ; Society and its norms. Sofia Pr..

Chicago-referens (17:e uppl.)

Nature and Existence of Man ; Humanism and Technological Revolution ; Language, Logic and Action ; Man, Logos and History ; Society and Its Norms. Sofia: Sofia Pr., 1974.

MLA-referens (8:e uppl.)

Nature and Existence of Man ; Humanism and Technological Revolution ; Language, Logic and Action ; Man, Logos and History ; Society and Its Norms. Sofia Pr., 1974.